scholarly journals Zinc Oxide and Silicone Nanoparticles to Improve the Resistance Mechanism and Annual Productivity of Salt-Stressed Mango Trees

Agronomy ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 558 ◽  
Author(s):  
Nabil I. Elsheery ◽  
Mohamed N. Helaly ◽  
Hanan M. El-Hoseiny ◽  
Shamel M. Alam-Eldein
Keyword(s):  
Zinc Oxide ◽  
Fruit Quality ◽  
Resistance Mechanism ◽  
Foliar Spray ◽  
Carbon Assimilation ◽  
Growth Yield ◽  
Stress Conditions ◽  
Mango Tree ◽  
Tree Resistance ◽  
Nano Zinc Oxide

Limited findings have been reported on using nanomaterials to improve tree fruit growth, development, and productivity under various stress conditions. To assess the effect of nanoparticles (NPs) like nano-zinc oxide (nZnO) and nano-silicon (nSi) on mango tree growth, yield, and fruit quality under salinity conditions, a factorial experiment was conducted using twelve treatments; three replicates each. Foliar spray of nZnO (50, 100, and 150 mg/L), nSi (150 and 300 mg/L), their combinations, and distilled water as a control was applied at full bloom and one month after of salt-stressed “Ewais” mango trees. Trees positively responded to different levels of nZnO and nSi. Plant growth, nutrients uptake, and carbon assimilation have improved with all treatments, except the higher concentration of nSi. Plant response to stress conditions was represented by a high level of proline content with all treatments, but changes in the activity of the antioxidant enzymes were positively related to the lower and medium concentrations of NPs. Flower malformation has significantly decreased, and the annual fruit yield and physiochemical characteristics have improved with all treatments. It could be recommended that a combination of 100 mg/L nZnO and 150 mg/L nSi improves mango tree resistance, annual crop load, and fruit quality under salinity conditions.

scholarly journals Exogenously applied nutrients can improve the chickpea productivity under water stress conditions by modulating the antioxidant enzyme system

2022 ◽  
Vol 82 ◽  
Author(s):  
N. Hussain ◽  
A. Yasmeen ◽  
M. M. Yousaf ◽  
W. Malik ◽  
S. Naz ◽  
...  
Keyword(s):  
Water Stress ◽  
Potassium Chloride ◽  
Antioxidant Enzyme ◽  
Enzyme System ◽  
Foliar Spray ◽  
Growth Yield ◽  
Grain Filling ◽  
Stress Conditions ◽  
Antioxidant Enzyme System ◽  
Grain Filling Stage

Abstract Water stress is one of the major factor restricting the growth and development of chickpea plants by inducing various morphological and physiological changes. Therefore, the present research activity was designed to improve the chickpea productivity under water stress conditions by modulating antioxidant enzyme system. Experimental treatments comprised of two chickpea genotypes i.e. Bhakhar 2011 (drought tolerant) and DUSHT (drought sensitive), two water stress levels i.e. water stress at flowering stage and water stress at flowering + pod formation + grain filling stage including well watered (control) and three exogenous application of nutrients i.e. KCl 200 ppm, MgCl2, 50 ppm and CaCl2, 10 mM including distilled water (control). Results indicated that water stress at various growth stages adversely affects the growth, yield and quality attributes of both chickpea cultivars. Exogenous application of nutrients improved the growth, yield and antioxidant enzyme activities of both chickpea genotypes even under water stress conditions. However, superior results were obtained with foliar spray of potassium chloride on Bhakhar 2011 under well-watered conditions. Similarly, foliar spray of potassium chloride on chickpea cultivar Bhakhar 2011 cultivated under stress at flowering + pod formation + grain filling stage produced significantly higher contents of superoxide dismutase, peroxidase and catalase. These results suggests that the application of potassium chloride mitigates the adverse effects of water stress and enhanced tolerance in chickpea mainly due to higher antioxidant enzymes activity, demonstrating the protective measures of plant cells in stress conditions.

scholarly journals Effect of plant growth regulators on growth, yield and fruit quality of strawberry (Fragaria x ananassa Duch.) under protected conditions

2017 ◽  
Vol 9 (3) ◽  
pp. 1676-1681
Author(s):  
Yash Thakur ◽  
J. S. Chandel ◽  
Pramod Verma
Keyword(s):  
Fruit Quality ◽  
Fruit Size ◽  
Foliar Spray ◽  
Growth Yield ◽  
Fruit Weight ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
And Control ◽  
Control Water

A field trial was conducted during 2015 and 2016, to study the effect ofgrowth regulators on growth, flowering, yield and fruit quality of strawberry cv. Chandler. The experiment was laid out in completely randomized design with 16 treatments viz.CPPU at 1, 2 and 4 ppm, GA3 at 25, 50 and 75 ppm, Promalin at 2, 4 and 6 ppm, GA4+7 at 5, 10 and15 ppm, NAA at 10, 20 and 30 ppm and control (water spray) and each treatment was replicated thrice. The results revealed that the plants sprayed with 15 ppm GA4+7 two weeks before flowering significantly reported highest plant height (33.43 cm), leaf area (239.70 cm2), number of flowers (31.94), fruit set (87.45 %), number of fruits per plant (29.02), yield (540.01 g/plant), fruit length (53.63 mm) and fruit diameter (37.19 mm) and fruit weight (23.70 g) as compared to control. This treatment resulted in 196.36 % increase in yield and 56.22 %in fruit weight over control. Plants sprayed with 6 ppm promalin also showed significant improvement in vegetative growth, fruit size, yield and fruit quality, which resulted in 137.92 % increase in yield and 51.81 % increase in fruit weight over control. Hence, it is concluded that foliar spray of 15 ppm GA4+7 applied 2 weeks before flowering is beneficial in improving growth, yield and fruit quality of strawberry plants.

scholarly journals Influence of Potassium Fertilization on Barhee Date Palms Growth, Yield and Fruit Quality Under Heat Stress Conditions.

2018 ◽  
Vol 9 (1) ◽  
pp. 73-80
Author(s):  
I. A. El-R. Elsayd ◽  
S. El-Merghany ◽  
E. M. A. Zaen El – Dean
Keyword(s):  
Heat Stress ◽  
Fruit Quality ◽  
Growth Yield ◽  
Stress Conditions ◽  
Date Palms ◽  
Potassium Fertilization
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